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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>企业官网</title>
    <script type="text/javascript">
        function HELLO() {
            alert ("你好，欢迎进入本网站！");
        }
        HELLO();
    </script>

    <style>
        body{margin: 0;
             padding: 0;
             box-sizing: border-box;
             font-family: 'Microsoft YaHei', sans-serif;
             line-height: 1.6;
             }
        header{
              display: flex;
              justify-content: space-between;
              align-items: center;
              padding: 1rem 2rem;
              background: #f8f9fa;
             }
        nav ul{
              display: flex;
              list-style: none;
             }
        nav li{
              margin-left: 1.5rem;
             }
        nav a{
              text-decoration: none;
              color: #333;
             }
        .box1{
              height: 400px;
              background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url(beijing1.jpg);
              background-size: cover;
              color: white;
              display: flex;
              flex-direction: column;
              justify-content: center;
              align-items: center;
              text-align: center;
              padding: 0 1rem;
              opacity: 0;
              animation: a 7s ease forwards;
             }
        @keyframes  a {
                form{
                    opacity: 0;
                }
                to{
                    opacity: 1;
                }
              }
        .box2{
              padding: 3rem 2rem;
             }
        .box3{
              display: grid;
              grid-template-columns: repeat(3, 1fr);
              gap: 2rem;
              margin-top: 2rem;
              opacity: 0;
              animation: a 11s ease forwards;
             }
        @keyframes  a {
                form{
                    opacity: 0;
                }
                to{
                    opacity: 1;
                }
              }
        article {
              border: 1px solid #ddd;
              padding: 1.5rem;
              border-radius: 5px;
             }
        footer {
              background: #333;
              color: white;
              text-align: center;
              padding: 1.5rem;
             }
    </style>

</head>
<body>

    <header>
        <img src="logo.jpg" alt="1">
        <nav>
            <ul>
                <li><a href="#1">首页</a></li>
                <li><a href="#2">产品</a></li>
                <li><a href="#">服务</a></li>
                <li><a href="#4">关于</a></li>
            </ul>
        </nav>
    </header>

    <main>
        <section class="box1" id="1">
            <h1>引领行业创新</h1>
            <p>专业的企业解决方案提供商</p>
            <button><a href="https://gitee.com/">了解更多</a> </button>
        </section>

        <section class="box2" id="2">
            <h2>我们的产品</h2>
            <div class="box3">
                <article>
                    <h3>产品A</h3>
                    <p><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br></p>
                </article>
                <article>
                    <h3>产品B</h3>
                    <p></p>
                </article>
                <article>
                    <h3>产品C</h3>
                    <p></p>
                </article>
            </div>
        </section>
    </main>

    <footer id="4">
        <p>© 2025 东东子未来 版权所有</p>
        <address>联系方式: 3301253909@qq.com</address>
    </footer>
</body>
</html>